Georges Melies, 1903. (Also refereed to as the infernal Boiling Pot) Here is a description from Wikipedia.
"The film shows a green-skinned demon who places a woman and then two courtiers into a burning cauldron. He performs an incantation and three spirits suddenly appear from the flames, before dancing above his head. Frolicking in hellish joy, the demon watches as the three spirits burn up and fall to earth.".